POLARIZED X-RAY-ABSORPTION SPECTROSCOPY OF CUPRIC CHLORIDE DIHYDRATE

被引：83

作者：

PICKERING, IJ

GEORGE, GN

机构：

[1] Stanford Synchrotron Radiation Laboratory, Stanford University, SLAC, Stanford, California 94309-0210, P.O. Box 4349

来源：

INORGANIC CHEMISTRY | 1995年 / 34卷 / 12期

关键词：

D O I：

10.1021/ic00116a004

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We report a detailed polarized single-crystal X-ray absorption spectroscopic study of CuCl2 . 2H(2)O, with measurements at both the copper K-edge and the chlorine K-edge. The angular dependence of both dipole-allowed and quadrupole-allowed transitions is determined in detail for the copper K-edge. The formally dipole-forbidden, quadrupole-allowed Cu K-edge 1s --> 3d transition behaves as a pure quadrupole transition, with no significant dipole contribution. The 1s --> 3d transition is found to have predominantly 3d(x2-y2) character, as expected, but evidence is also given for vacancies in a lower lying d orbital, possibly 3d(x), arising from the presence of d pi-d pi bonding with the chloride ligands. The chlorine K-edge data show a strongly polarized pre-edge resonance at similar to 2821 eV, which can be interpreted in terms of a transition from the chlorine Is orbital to an antibonding orbital with significant contributions from both chlorine 3p and the half-filled copper 3d(x2-y2) orbital.

引用

页码：3142 / 3152

页数：11

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